L99BM218-TR [STMicroelectronics]

L99BM218 is a 18 channel battery cells monitoring and balancing IC.

The device belongs to the L99BM2 chipset family for high voltage battery management systems monitoring and control.

• -40°C to +125°C operating temperature range
• HBM ESD classification level 2
• CDM ESD classification level C4B
• Fully synchronized high accuracy measurements on cell voltage, and module voltage with dedicated ADC:
  • Total error including ageing and post soldering <1.4 mV at 3.3V, -40°C to 105°C
  • 16-bit resolution
  • Cell range: -1 to 5.5V
  • Integrated digital filtering with programmable cut-off frequency from 3.3 kHz to 4.4 Hz
  • Fully redundant architecture
  • Cell and busbar support on every channel
  • Dedicated busbar channel with ±1V range
• Passive internal cell balancing up to 400mA, supporting time-continuous and PWM modes, with automatic cool down based on external NTC sensing. Overcurrent protection during balancing available also in low power mode
• Integrated DCDC converter for energy efficiency:
  • Normal Mode: <2mA
• 10 configurable GPIO
• SPI Controller and I2C Controller peripherals for interfacing external EEPROMs and sensors
• SPI Target for direct MCU interface
• Stackable architecture for high voltage battery packs up to 59 devices
• Embedded NVM for configuration parameters storage and runtime configuration integrity check
• Ultra-fast vertical interface peripheral for isolated communication
• Compatible with L99BM2C pack monitoring chip with a max de-synchronization time of 7 us at system level